If a piece of pure iron is placed in pure nitrogen, nothing happens. if the iron is exposed to air, it begins to rust. what conclusion can you make about air, based on this observation?

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .